Ошибка с маппингом при создании нового exchange rate

[delaynore]

{
  "message": "Internal server error",
  "details": "Missing type map configuration or unsupported mapping.
                 Mapping types:
                     Task`1 -> ExchangeRateResponse
                     System.Threading.Tasks.Task`1[[CurrencyExchange.API.Models.ExchangeRate,              CurrencyExchange.API, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]] -> CurrencyExchange.API.Contracts.ExchangeRate.ExchangeRateResponse"
}